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Finding the Fourth Proportional to 131,605.20, 197,407.80 and 80,866.80

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Solution

The fourth proportional to 131,605.20, 197,407.80 and 80,866.80 is: 121,300.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,605.20 : 197,407.80 = 80,866.80 : x
  2. Step 2: Convert to fraction form
    131,605.20/197,407.80 = 80,866.80/x
  3. Step 3: Cross multiply
    131,605.20x = 197,407.80 × 80,866.80
  4. Step 4: Simplify right side
    131,605.20x = 15,963,737,081.04
  5. Step 5: Solve for x
    x = 15,963,737,081.04/131,605.20
  6. Step 6: Final answer
    x = 121,300.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.